Low Ambient VRB Heat Recovery

Lennox® Low Ambient VRF Heat Recovery units combine the ability to simultaneously heat and cool multiple zones from a single system with strong heating performance that maximizes indoor comfort, even in negative outdoor temperatures. Our team of experts provides continual support, from the initial design to startup and commissioning. It's the cold climate solution from the experts you trust.

• Inverter-Driven Compressor – Reduces energy usage by varying the compressor speed in response to the capacity demand at each indoor unit
• High-Efficiency Operation – High part-load IEER efficiencies compared to traditional HVAC systems, and simultaneous heating and cooling SCHE efficiencies up to 33.9 offer some of the most efficient systems on the market.
• Low Noise Operation – Sound levels as low as 62 dB(A).

• 6- to 30-ton capacities 
• 208-230V/3PH/60HZ
• 460V/3PH/60HZ
• Up to 3,280 ft. of refrigerant piping
• All-inverter compressors

The MS Box is the key component of the Lennox VRF Heat Recovery systems. It offers flexible installation configurations in 2-, 4-, 6-, 8-, 10-, and 12-port models, with each port featuring a dedicated subcooling circuit. Integral hot gas bypass control maintains minimum suction pressure during part-load operation.

• Zoning Flexibility - Combine up to 5 zones with similar load profiles on a single port (up to 54,000 btu/h per port), with up to 10 indoor units and 144,000 btu/h per MS Box. 
• Twin Ports — Twin ports together for indoor units above 54,000 btu/h.
• Versatile Design — MS Boxes can be piped from either side, allowing maximum design flexibility even in buildings with limited spacing.
• Integrated Suction Pressure Protection — An integrated hot gas bypass valve provides an additional measure of compressor protection by helping maintain minimum suction pressure during low load conditions.
• Heat Recovery — MS box operation allows condensed liquid refrigerant to flow from an indoor unit in the heating mode into an indoor unit in the cooling mode, reducing waste heat rejected at the condensing unit and improving the overall operational efficiency of the heat recovery system.